a. N2O5 b. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. 2:53 5.3k LIKES. Nitrogen is about 3.3% of body mass. Hydrogen is in water, plus it's an important electron carrier. a) C6H3N3O7 b) CH4N2O c) LiNH2 d) Pb(N3)2 FREE Expert Solution Show answer. Calcium accounts for 1.5% of body mass. 9.7k VIEWS. 25. Which of the following compounds contains the highest mass percent of nitrogen? A) 7.87 g B) 782 g C) 15.7 g (c) contains 6 moles of carbon atoms per mole of molecules of Vitamin C. (d) has a molecular mass of 176.12. a&c a,c&d a,b&c all of the above 6. If the compound contains 12.8% nitrogen and 9.8% sulphur how many nitrogen and sulphur atoms are present per atom of sodium : About 29 of these elements are thought to play an active positive role in life and health in humans. In the calculations below, I have rounded the masses to whole numbers. Also, the numerators are the mass of hydrogen in the compound in grams, and the denominators are the molar masses of the compounds … a) NH2OH. The average 70 kg (150 lb) adult human body contains approximately 7 × 10 27 atoms and contains at least detectable traces of 60 chemical elements. Which compound contains the highest percentage of nitrogen by mass? Divide the mass of hydrogen in each compound by the molar mass of the compound and multiply by 100. Which compound contains the highest percentage of nitrogen by mass? b) NH4NH2CO2. Answer : 37.84 Solution : NA Related Video. It's found in proteins and nucleic acids. Hydrogen atoms are the most numerous type of atom in a human, but because they are so light, they only make up around 10% of the mass. Finding molar mass starts with units of grams per mole (g/mol). 71 1001MSC Workbook Prepared by Dr. Abdullah Karaksha b. Nitrogen in C 10 H 14 N 2: Q72 Calculate the percent composition and determine the molecular formula and the empirical formula for the nitrogen-oxygen compound that results when 12.04 g of nitrogen gas (N 2) is reacted with enough oxygen gas (O 2) to produce 39.54 g of product.The molar mass … A substance contains 35.0 g nitrogen, 5.05 g hydrogen, and 60.0 g of oxygen. The molecular weight of a compound is 329 g/mol and contains 1 mole of Na per mole of molecules. Of the compounds listed in the question, water has the highest percent mass of hydrogen. Find percentage nitrogen by mass in Histamine? How many grams of hydrogen are there in a 156-g sample of this substance? The relative amounts of each element vary by individual, mainly due to differences … Example: What is the total mass of each of the following compounds? … View All. 28.2k LIKES. Which compound contains the highest PERCENTAGE of NITROGEN BY MASS? 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